eSpace IAD
Troubleshooting
2 Analyzing and Rectifying Faults
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
If yes, run the fpga set limitflux enable protocol sipreg flux 50 command on the
softswitch to disable the traffic restriction.
If no, go to Step 3.
Step 3 Configure a different registration duration on the IAD. For example, run the sip server 0
address 192.166.1.16 expire-time 200 command.
Step 4 Check whether the fault is rectified.
If yes, the procedure ends.
If no, go to Step 5.
Step 5 Contact Huawei technical support.
----End
2.1.21 One-Way Voice
Symptom
When making calls through the IAD, the calling party or the called party cannot hear any
voice.
Cause
The possible causes are as follows:
The local device cannot receive the RTP stream from the peer device due to network
problems.
The IAD's uplink port is set to half-duplex mode.
The called party enables the RTP encryption function.
The SIP signaling media negotiation is abnormal.
Solution
Step 1 Run the display interface command in the Ethernet switch mode to view the duplex mode of
the IAD network port. If the duplex mode is half-duplex, run the duplex command to set the
IAD to auto-negotiation mode.
Step 2 View the status of the network connection between the IAD and the opposite gateway (for
example, IAD or trunk gateway). Firewalls or NATs between devices may cause the one-way
data blocking. In this case, you can run the pinga.b.c.d command to check the fault cause.
Step 3 Ensure that the called party has not enabled the RTP encryption function. The IAD does not
support the RTP encryption function.
Step 4 Capture and analyze IAD SIP signaling packets. Check whether the session attribute value in
the IAD INVITE message is sendrecv.
If the value is sendonly, the IAD sends RTP packets but cannot receive voice data
packets, resulting in the one-way voice fault.
If the value is sendrecv, go to Step 5.
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